Sawtee



UNITED N sTATEs PATENT oEEICE.

NATHAN SAWYER AND THOS. W. SMITH, O11" WASHINGTON, DISTRICT OF COLUMBIA.

BRICK-PRESS FOR PRESSING BRICKS FROM DRY CLAY.

Specification of Letters Patent No. 881, dated August 13, 1838.

To all whom it may concern Be it known that we, NATHAN SAWYER and THoMAsWILLIAM SMITH, of Washington, in the District of Columbia, have inventedan improvement in the manner of lling the molds and removing the pressedbrick in those machines which are intended for pressing brick from dryclay, such as that for which Letters Patent were obtained by the'saidNathan Sawyer on the 8th of April, 1835, but which may be applied to allmachines for pressing brick from clay notmade into mortar; and we dohereby declare the following to be a full and exact description thereof.

The object in view is to supply the pulverf f ized clay to the mold,vbymeans of a hopper, Y instead of by a shovel as ordinarily prac.-

tised.

A sliding feeder a; which should be about two inches wider than thelength of a brick, and about four inches thick, has a mortise or openingb, through it, every way larger than a brick, to allow more clay to-enter the molds than `is necessary to form the said brick. This feederstands, upon a suitable bed upon which it slides back Vand forth overthe brick mold.

c, is the piston for pressing the brick, and d, a brick which has beenpressed and raised to the top of the mold, ready for removal, as inNathan Sawyers press.

e, e, are the guides between which the feeder slides.

The cog wheels f, g, b, z', j, are employed for giving motion to thefeeder, with the contrivance necessary for throwing it in and out ofgear. The manner of gearing them will not require to be described, beingsufficiently apparent.

A piece of iron or latch k, is attached to the shaft Z, of the feeder.Upon the shaft of the wheel j there is a 'catch (m) which revolvingstrikes against the latch 7c, and drives forward the feeder, but whenthe latch la, is turned down upon its pin, it will allow the catch m, topass without` acting upon it. The shaft of the wheel has onl it asimilar catch andas it turns in a direc-V tion opposite to that of y',it operates on a catch n, on the shaft Z, and slides the feeder back.Any convenient number of feeders,

placed either in one or two ranges, accordlng to the compass of themachine, may be `driven by this gearing, there being suitable plates, orarms, with latches, upon the shafts of the wheels. The rod 0, which isrepresented as extending from an arm on the upper end of the catch le,passes on to the front A ofthe machine, where it has a loop, or handle,to enable the person in attendance to stop the feeder.

The hopper is placed so that ,v its mouth will be very near the feeder,which when drawn back will have the mortise b, directly under the mouthof the hopper, which Vfills the cavity with clay.

To prevent the obstruction which might Y Varise from the clay passingbetween the hopper and the feeder, I place a box within the mouth of thehopper as represented in section at A, Figure 2. This box is open at topis forced forward it stands directly over the mold, into which the clayconsequently falls, and where it is pressed. The feeder as it advancespushes the pressed brick forward,

and as it retreats it removes all superfluous clay from the mold, havinga curved pro-` jection on its lower side, to give the concave surface tothe clay, in accordancewith the form of the mold, as describedby saidNathan Sawyer in the specification of his patent before named. The frontend ofthe feeder g, is sloped off to allow of thepartial descent of thepiston as it is withdrawn.

`What we claim as our invention and improvement is-V p y l. The wholearrangement of the feeder, taking its supply from a hopper, supplyingthe mold, and removing the pressed brick, as set forth.

2. We also claim the application of the box, within the hopper, andwhich -is attached to the hopper by cloth, or leather passed looselyover the top of the box to alarrangement thereof, and its application t010W said box to pass freely up andr down the purpose expressed.

over the surface of the feeder, as described, N.V SAVYER.

and although We do not intend to coniine THOS. W. SMITH. ourselves tothe particular arrangement of Witnesses: Y

the gearing and its appendages, for operat LINToN THORN,

ing the feeders, We do claim the particular Y W. THOMPSON.

